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This beautiful version of geometry was developed to keep track of things that move! Here's a very brief introduction.

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Imagine a circle with radius 1cm rolling completely along the circumference of a circle with radius 4cm. How many rotations did the smaller circle make? Be prepared for a surprise!

Two-faced conic sections

The conic sections can be defined by slicing through a cone. They can also be defined in terms of a point (the focus) and a line (the directrix). How are the two definitions connected? Through Dandelin spheres! Find out more in this article...

Latest podcasts

Gravitational waves reveal cosmic hum

There's been some huge news in the world of cosmology: for the first time scientists have detected a low frequency hum of gravitational waves. In this podcast we find out what these new results mean, and why they're so exciting, with three of our favourite cosmologist: Michalis Agathos, Amelia Drew, and Ulrich Sperhake.

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Sarah Hart: Once upon a prime

Maths and literature: there are more connections than you think and they'll enhance your pleasure of both. Find out more with the fabulous Sarah Hart in this podcast!

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Maths in a minute

Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words. From symmetry to Euclid's axioms, and from binary numbers to the prosecutor's fallacy, learn some maths without too much effort.

Maths in a minute

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